Firefox for Web Developers
HTML hidden=until-found and auto-opening <details> is newly baseline… or is it? Here's how it works, and issues to watch out for:
Dec 19 at 12:59pmWeb
Show threadFirefox for Web DevelopersDec 19

Here are the browser bug reports:

https://bugzilla.mozilla.org/show_bug.cgi?id=2006040
https://bugs.webkit.org/show_bug.cgi?id=304174

And the spec discussion:

https://github.com/whatwg/html/issues/12019

2006040 - Find-in-page should scroll to revealed matches

ASSIGNED (jjaschke) in Core - Find Backend. Last updated 2025-12-19.

Show threadHiddeDec 19
@firefoxwebdevs love that you're doing these videos! Very helpful and full of useful info!
Show threadNathan KnowlerDec 19
@firefoxwebdevs 😩 Oh no, it’s `content-visibility: auto` all over again (i.e. Safari didn’t make content available for find-in-page, so there was a Baseline regression that lasted an entire Safari major version).
Show threadMarius Gundersen - mdg 🌻Dec 19
@firefoxwebdevs I love the tautology that is hidden until found
Show thread👾 Attila GondaDec 19

@firefoxwebdevs thank you @jaffathecake to explore and explain this feature!

(and happy holidays for you and people behind Firefox implementing web features!)

Show threaddan leathermanDec 19
@firefoxwebdevs thank you for the work on this! Assuming the functionality will flow to mobile versions as well?
Show threadFirefox for Web DevelopersDec 19
@danleatherman absolutely